/Engine/Source/Runtime/Engine/Classes/GameFramework/PlayerController.h
Is the specified player muted by this controlling player for any reason (gameplay, system, etc), check voice interface IsMuted() for system mutes
true if player is muted, false otherwise
virtual bool IsPlayerMuted ( const class [FUniqueNetId](API\Runtime\CoreOnline\Online\FUniqueNetId) & PlayerId )